000 04796nas a2200469 a 4500
005 20260818132654.0
008 140612s2014 th n m|rtt |0 0 eng d
035 _a.b12147370
099 9 _aAIT Thesis no.UWEM-14-06
100 1 _aSemkuyu, Dickson John
245 1 0 _aGroundwater vulnerability and risk assessment to pollution in Kathmandu
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2014
300 _a87 leaves :
_bill.(some col.)
490 1 _aThesis ;
_vno. UWEM-14-06
520 _aGroundwater pollution is complex, invisible and has a long - ter m impact. To remediate polluted groundwater is very expensive and often impractical especially for developing countries. Groundwater vulnerability and risk assessment is a useful tool for groundwater pollution prevention and control . This research study was focussed on shallow aquifer groundwater vulnerability and risk assessment to pollution in the groundwater basin of Kathmandu valley , in Nepal. In this study, GIS based DRASTIC model have been used to assess intrinsic and specific aquifer vulnerability to pollution whereas Groundwater Risk assessment Model (GRAM) was used to assess risk to groundwater pollution in the groundwater basin of Kathmandu valley . Seven hydrogeological factors were used in DRASTIC model to produce DRASTIC Index (DI) map which re present intrinsic groundwater vulnerability to pollution of the area. The seven hydrogeological factors used were depth to water, net recharge, aquifer media, soil media, topography, impact of vadose zone, and hydraulic conductivity of aquifer. GIS based G RAM was used to produce likelihood of release of hazards , likelihood of detection of hazards , consequence of hazards and residual risk of groundwater contamination in terms of nitrate in the groundwater basin of Kathmandu valley . It was found that more t han a half of the groundwater basin area of Kathmandu valley is susceptible to groundwater pollution. Also the Northern groundwater district is relatively more vulnerable to pollution than central and Southern ones. However after taking to account the barr iers to groundwater pollution and likelihood of hazards release and detection, it was observed that most areas of the groundwater basin are at moderate residual risk to groundwater pollution . This study provides primary information about vulnerability and risk to pollution for groundwater basin of Kathmandu valley. The findings of this study can be used as a useful tool for managing groundwater resources in Kathmandu valley.
502 _aThesis (M. Eng.) - Asian Institute of Technology - UNESCO-IHE, 2014
500 _aA thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering in Urban Water Engineering and Management at Asian Institute of Technology and the degree of Master of Science in Municipal Water and Infrastructure with specialisation Urban Water Engineering and Management at the UNESCO-IHE
650 0 _aGroundwater
_xPollution
_xRisk assessment
_zNepal
_zKathmandu
700 0 _aThammarat Koottatep,
_eExamination Committee
700 1 _aPandey, Vishnu,
_eExternal expert
700 1 _aBabel, Mukand Singh,
_eExamination Committee
700 1 _aZhou, Yangxiao,
_eCo-Chairperson
700 1 _aShrestha, Sangam,
_eChairperson
710 2 _aAIT Fellowship,
_eScholarship donor
710 2 _aUNESCO{u2013}IHE,
_eScholarship donor
710 2 _aNetherlands Fellowships Programmes (NFP),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. UWEM-14-06
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B04665
907 _a.b12147370
_bmnait
_cz
902 _a240404
998 _b0
_c150212
_dm
_ea
_fz
_g0
962 _a000:001:PDF:b1214737:001995:0:0:0:0:0:0
_tAbstract--AIT Thesis no.UWEM -14-06
_vn
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c20
942 _c40
909 _aBarcode : 30050120379648
_bCREATED : 2015-12-02
_cRECORD # : i12838408
_dLPATRON : 1028603
_eLCHKIN : 2018-05-14
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 5
_iTOT CHKOUT : 4
_jTOT RENEW : 5
909 _aBarcode : 30050120572127
_bCREATED : 2015-12-02
_cRECORD # : i1283841x
_dLPATRON : 1028404
_eLCHKIN : 2018-07-14
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 7
_iTOT CHKOUT : 3
_jTOT RENEW : 4
909 _aBarcode : 30050160018320
_bCREATED : 2016-01-27
_cRECORD # : i12875387
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
999 _c52262
_d52262